B_CASE-319 + BT Large-capacity, Portable, Waterproof, Shockproof and F – Gain Express
10 Button Cell Type 319 Batteries Renata | eBay
Amazon.com: Duracell 319 Silver Oxide Button Battery, 1 Count Pack, 319 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More : Health & Household